Author
Topic: nidet help (Read 4452 times)

Please give me some advices how to set the motor steps in MACH3I mean if i open mach3 i go to setting and set seteps per unitYou can choose at this point, Y, Z, X, or A axisI do not know how far to move up axisI work in mmand I use for that Digital IndicatorFor example, when you write a 5mm machine is travels 4.987mma few times Digital Indicator shows the machine is moved 5mmit should be a good setting steps per unitFor example, ball screw is pinch 4mm the driver is 10 micro stepsthe motors motors 200 steps

So we'll take the motors 200 steps multiply that by the drives 10 micro step.(200 X 10 = 2000)The drive needs 2000 pulses (or steps) to turn the screw one revolution thusmaking the axismove 4mm. So now we take those 2000 steps and divide by the pitch of the screw,which is 4.(2000 / 4 = 500). In other words we need 500 steps to move one unit or mm.

but the setting in Mach3 shows me 513 steps This maybe the problem is backlashproblem bacause it shows 513 steps .but the worst thing is if you set theStepps motor to travels 5mm and the machine is moving 5mm everything is ok

but how do you tell the machine to go 200mm, machine is travels197.499mm can you tell my woth problem it is

Several things can account for this error - slop in some portion of the machine, the screws aren't as accurate as they could be, something is slipping... Make sure the mechanical part of the machine is good before you beat on the software side, otherwise you will be forever chasing a number that doesn't exist in software because the hardwae is nor reliable.

you might try putting 519.4963 and see how that affects shorter moves, it should take care of things for the 200mm move.